For some reason, people are sad about the gruesome beheading of hitchBOT, the hitchhiking robot that was trying to make its way from Massachusetts to California. HitchBOT met his end in Philadelphia last week, which means everyone is using it as an opportunity to dust off their favorite Philadelphia jokes. Of course, since hitchBOT was able to travel across all of Canada and much of Germany, people are also using this as an excuse to...